Diffuser



FIG. 1 is a perspective view of a diffuser;

FIG. 2 is a front view of the diffuser;

FIG. 3 is a rear view of the diffuser;

FIG. 4 is a side view of the diffuser;

FIG. 5 is a top view of the diffuser; and,

FIG. 6 is a bottom view of the diffuser.

The dash type broken lines in the Figures are for the purpose of illustrating unclaimed portions of the diffuser and form no part of the claimed design. 

CLAIM The ornamental design for a diffuser, as shown and described. 